TBM inverted arch pouring device and synchronous inverted arch cast-in-place method thereof

Abstract

The application provides a TBM inverted arch pouring device and a synchronous inverted arch cast-in-place method, and belongs to the technical field of TBM engineering machinery; the device comprises a carrying trolley, an inverted arch formwork, a center groove formwork, a pouring system and a lifting track device; the carrying trolley is in sliding connection with a connecting bridge in the TBM; the inverted arch formwork comprises a formwork main body, a pouring window and a first locomotive track; the pouring system comprises a concrete tank, a self-walking trolley and a grouting pipe, the concrete tank is installed on the self-walking trolley, the self-walking trolley is displaced on the first locomotive track, and the grouting pipe is connected with the concrete tank and the pouring window; the lifting track device is connected with the center groove formwork, the center groove formwork is installed below the inverted arch formwork before pouring; when pouring is completed and the secondary lining is filled and leveled, an operator levels the inverted arch pouring plane through the lifting track device so as to pour; after the inverted arch plane is poured and initial setting is completed, the center groove formwork is demolded through the lifting track device, and the pouring of the inverted arch is completed.

Description

Technical Field

[0001] This invention belongs to the field of TBM engineering machinery technology, and relates to a TBM invert arch casting device and its synchronous invert arch casting method. Background Technology

[0002] Currently, there are generally two methods for laying inverts when constructing long tunnels using open-face TBMs. One method involves using an invert crane configured with the TBM to lay precast inverts. This method requires setting up an invert prefabrication workshop outside the tunnel, which is costly. Furthermore, there will be large construction joints during the installation of the precast inverts, requiring secondary grouting after installation. The second method involves using a TBM for excavation at the front end and then lining the inverts in place by arranging an invert trestle at the rear end. However, this method is not carried out simultaneously with the TBM excavation and consists of two different systems, which increases both equipment and labor costs. Summary of the Invention

[0003] The present invention aims to provide a method for casting and lining inverted arches by improving the TBM inverted arch casting device and its synchronous inverted arch casting method in the TBM connecting bridge area, so that the entire inverted arch casting process can be carried out synchronously with TBM tunneling, which saves both construction time and engineering costs.

[0004] This invention provides a TBM invert arch casting device, including a transport trolley, an invert arch formwork, a central trench formwork, a casting system, and a lifting track device;

[0005] The transport trolley is slidably connected to the connecting bridge in the TBM for conveying concrete;

[0006] The inverted arch formwork is installed on a transport trolley, and the inverted arch formwork includes a formwork body, a pouring window and a first locomotive track set on the formwork body, the first locomotive track extends along the length of the formwork body, and the pouring window is provided in two sets respectively set on both sides of the first locomotive track;

[0007] The pouring system is installed on the invert arch formwork, and the pouring system includes a concrete hopper, a self-propelled trolley and a grouting pipe. The concrete hopper is installed on the self-propelled trolley, which moves on the first locomotive track by its own power. One end of the grouting pipe is connected to the concrete hopper, and the other end of the grouting pipe extends to the pouring window.

[0008] The lifting track device is connected to the central groove template. Before pouring, the central groove template is installed below the invert arch template. After the pouring is completed and the secondary lining is filled, the operator uses the lifting track device to level the horizontal surface of the invert arch for pouring. After the horizontal surface of the invert arch is poured and initially set, the central groove template is removed using the lifting track device to complete the invert arch pouring.

[0009] Optionally, the lifting track device includes a telescopic arm, an outer traveling platform, a second locomotive track, and a central slot connecting device;

[0010] One end of the telescopic arm is connected to the TBM connecting bridge, and the other end of the telescopic arm is connected to the outer walking platform.

[0011] The second locomotive track is installed on the outer running platform;

[0012] A center groove connecting device is installed on the end face of the outer traveling platform away from the second locomotive track. The center groove connecting device is connected to the center groove template.

[0013] Optionally, the transport trolley includes a traveling wheel mechanism, a drive device, a transport frame, and a telescopic device; the traveling wheel mechanism is movably connected to the TBM connecting bridge; the drive device is used to drive the traveling wheel mechanism to move on the TBM connecting bridge; one end of the telescopic device is connected to the transport frame, and the other end of the telescopic device is fixedly connected to the TBM connecting bridge, and the telescopic device is used to drive the transport frame to move vertically relative to the TBM connecting bridge.

[0014] Optionally, a single set of pouring windows may have multiple pieces spaced apart from each other along the length of the formwork body;

[0015] Furthermore, hoisting devices are installed on both sides of the two sets of pouring windows.

[0016] Optionally, the grouting pipe is configured as a telescopic grouting pipe structure.

[0017] Optionally, a rotary drive is provided between the grouting pipe and the concrete tank, with one end of the rotary drive fixedly connected to the concrete tank and the other end of the rotary drive fixedly connected to the grouting pipe.

[0018] As a further aspect of the present invention, the TBM invert arch casting device also includes a tilting track platform;

[0019] The tilting track platform is used to provide a carrying track for the locomotive to enter the front of the TBM. The tilting track platform includes a movable track platform and a wire rope winch. The fixed end of the wire rope winch is connected to the TBM connecting bridge, and the driving end of the wire rope winch is connected to the movable track platform to drive the movable track platform to open or close.

[0020] This invention also provides a method for simultaneous in-situ casting of the invert arch of a TBM connecting bridge, comprising:

[0021] After the initial shape of the invert arch model is completed by binding the reinforcing bars, concrete is poured using the TBM invert arch pouring device described above. First, the transport trolley moves to the rear end and overlaps with the track of the lifting rail device. The pouring system travels from the rear end of the TBM through the lifting rail device to the end of the transport trolley track. The transport trolley moves forward to the reinforcing bar area and uses the telescopic arm to press the invert arch formwork against the bound reinforcing bar end. The pouring system pours concrete onto the reinforcing bar formwork. After the pouring is completed and the concrete has initially set, the telescopic arm is used to demold the invert arch formwork. After the TBM excavates to the front end where there is a ring of reinforcing bar formwork, the ring is poured.

[0022] After the invert arch is poured and filled, the invert arch pouring and filling section enters the next formwork stage. At this time, the central groove template is installed in the completed invert arch pouring and filling section using a lifting rail device, and the upper part of the invert arch is filled and smoothed with concrete. After the concrete is formed, the invert arch is demolded using a lifting rail device.

[0023] When the invert arch is poured and all the trailer sections set up at the rear of the TBM are completed, the first locomotive track installation section begins.

[0024] After the invert arch has been subjected to equal strength and has reached the strength to withstand the weight of the locomotive, the intermediate tilting track platform is opened, and the operators enter the invert arch area to lay the track reserved in the spray mixing area on the invert arch.

[0025] Once all the TBM trailers are completely detached from the rear track, the rear track can be disassembled and installed on the invert arch, thus completing the laying of the invert arch and the four-track, three-line system.

[0026] Optionally, the present invention provides a method for synchronous invert arch casting of a TBM connecting bridge, which further includes a ramp section. The locomotive transporting materials travels from the invert arch track to the intermediate platform track of the trailer via the ramp section to transport the materials to the TBM invert arch casting section.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] (1) The TBM invert arch casting device provided by the present invention is connected to the TBM via a connecting bridge to achieve the purpose of simultaneous TBM tunneling and cast-in-place invert arch casting. Specifically, a central groove template and a lifting rail device are set in the connector area. Before casting, the central groove template is installed below the invert arch template. After the initial setting of the filled concrete, the central groove template is removed using the lifting rail device to complete the invert arch casting.

[0029] (2) The TBM invert arch casting device provided by the present invention is set in the connecting bridge area of ​​the TBM, so that the required power sources such as electricity, gas and hydraulic are shared with the TBM. It has a simple structure, is convenient and practical, and has good economic efficiency. It also effectively enables construction personnel in the TBM spraying area to operate spraying and lining invert arch construction at the same time, which is convenient for construction, saves personnel expenses, and has good economic efficiency.

[0030] (3) The TBM invert arch casting device provided by the present invention, by setting a first locomotive track and a second locomotive track, eliminates the need to lay temporary material transport locomotive tracks during the invert arch casting process, and the tracks and invert arch are formed in one step; compared with precast invert arch, the cost is reduced.

[0031] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0032] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0033] Figure 1 This is a schematic diagram of the overall structure of a TBM inverted arch casting device according to an embodiment of the present invention;

[0034] Figure 2 yes Figure 1 A cross-sectional schematic diagram of the transport trolley section;

[0035] Figure 3 yes Figure 1 Schematic diagram of the cross section at the inverted arch formwork;

[0036] Figure 4 yes Figure 1 Front view of the arch formwork;

[0037] Figure 5 yes Figure 4 A top-down view;

[0038] Figure 6 yes Figure 1 Schematic diagram of the cross section at the central groove template;

[0039] Figure 7 yes Figure 1 Schematic diagram of the intermediate casting system;

[0040] Figure 8 yes Figure 7 A side view diagram;

[0041] Figure 9 yes Figure 1 A cross-sectional schematic diagram of the lifting track device;

[0042] Figure 10 yes Figure 1 A cross-sectional schematic diagram of the central tilting track platform;

[0043] Figure 11This is a schematic diagram of a TBM synchronous cast-in-place inverted arch forming and a four-track three-line system in an embodiment of the present invention.

[0044] in:

[0045] 1. Transport trolley; 101. Walking wheel mechanism; 102. Drive unit; 103. Transport frame; 104. Telescopic device;

[0046] 2. Invert arch formwork; 201. Pouring window; 202. First locomotive track; 203. Hoisting device;

[0047] 3. Center slot template,

[0048] 4. Pouring system, 401. Concrete hopper, 402. Self-propelled trolley, 403. Grouting pipe;

[0049] 5. Lifting rail device; 501. Telescopic arm; 502. Outer traveling platform; 503. Second locomotive rail; 504. Central groove connecting device.

[0050] 6. Tilting track platform; 601. Movable track platform; 602. Wire rope winch. Detailed Implementation

[0051] To make the above-mentioned objectives, features, and advantages of the present invention clearer and easier to understand, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the accompanying drawings of the present invention are all in a simplified form and use non-precise proportions, and are only used to facilitate and clearly assist in illustrating the implementation of the present invention; the "several" mentioned in the present invention are not limited to the specific number shown in the examples in the accompanying drawings; the orientations or positional relationships indicated by terms such as "front," "middle," "rear," "left," "right," "up," "down," "top," "bottom," and "center" mentioned in the present invention are all based on the orientations or positional relationships shown in the accompanying drawings of the present invention, and do not indicate or imply that the device or component referred to must have a specific orientation, nor should they be construed as limitations on the present invention.

[0052] Example:

[0053] See Figures 1 to 10 As shown, the present invention provides a TBM invert arch pouring device that can realize the function of simultaneously excavating and lining the invert arch, including a transport trolley 1, an invert arch template 2, a central trench template 3, a pouring system 4, a lifting track device 5, and a tilting track platform 6.

[0054] The transport vehicle 1 includes a walking wheel mechanism 101, a drive device 102, a transport frame 103, and a telescopic device 104; the walking wheel mechanism 101 is movably connected to the TBM connecting bridge; the drive device 102 is used to drive the walking wheel mechanism 101 to move on the TBM connecting bridge; one end of the telescopic device 104 is connected to the transport frame 103, and the other end of the telescopic device 104 is fixedly connected to the TBM connecting bridge, and the telescopic device 104 is used to drive the transport frame 103 to move vertically relative to the TBM connecting bridge.

[0055] The invert arch template 2 includes a template body, a casting window 201, a first locomotive track 202, and a hoisting device 203 disposed on the template body. The first locomotive track 202 extends along the length of the template body. The casting window 201 has two sets respectively disposed on both sides of the first locomotive track 202. Each set of the first locomotive track 202 has multiple pieces spaced apart along the length of the template body. The hoisting device 203 has two sets respectively disposed on both sides of the two sets of casting windows 201. Preferably, the length of the invert arch template 2 is preferably set to 10 meters. In this invention, the use of the invert arch template helps to ensure the flatness of the invert arch during casting, thereby improving the casting quality. More preferably, the hoisting device 203 is preferably configured as a hook for easy connection to a hoisting system (such as a hoisting cable). Even more preferably, to facilitate the stable hoisting of the invert arch template 2, the hoisting device 203 has multiple sets symmetrically arranged along the central axis of the invert arch template 2.

[0056] The central groove template 3 is connected to the lifting rail device 5. The central groove template 3 is used for opening the central groove of the invert arch. When the central groove template 3 is used, the lifting rail device 5 is lowered. After the concrete is poured and initially set, the template is removed using the lifting rail device 5, and the next ring of the invert arch is poured.

[0057] The pouring system 4 is used to pour concrete after the steel bars are tied. The pouring system 4 includes a concrete tank 401, a self-propelled trolley 402 and a grouting pipe 403. The self-propelled trolley 402 moves on the first locomotive track 202 by its own power. The grouting pipe 403 is driven to rotate by a hydraulic cylinder. The grouting pipe 403 can be extended or retracted according to the length of use to facilitate grouting of the bottom and sides.

[0058] The lifting track device 5 is connected to the central groove template 3, and the lifting track device 5 includes a telescopic arm 501, an outer walking platform 502, a second locomotive track 503, and a central groove connecting device 504. The outer walking platform 502 is used by operators to level the inverted arch surface, and the telescopic arm 501 is used to demold the central groove template 3. Specifically, one end of the telescopic arm 501 is connected to the TBM connecting bridge, and the other end of the telescopic arm 501 is connected to the outer walking platform 502; the second locomotive track (503) is installed on the outer walking platform 502; the central groove connecting device 504 is installed on the end face of the outer walking platform 502 away from the second locomotive track 503, and the central groove connecting device 504 is connected to the central groove template 3. The telescopic arm 501 drives the outer walking platform 502 to move vertically, thereby driving the central groove template 3 to move vertically, so as to realize the placement or demolding of the central groove template 3. Preferably, the central groove connecting device 504 is disposed in the middle of the outer traveling platform 502, and the telescopic arm 501 is preferably provided in two sets symmetrically arranged along the central groove connecting device 504, with each set of telescopic arms 501 preferably having at least one piece; the second locomotive track 503 is provided in two sets correspondingly arranged along the central groove connecting device 504. More preferably, the central groove connecting device 504 is detachably connected to the central groove template 3.

[0059] The tilting track platform 6 is used to provide a carrying track for the locomotive to enter the front end of the TBM. The tilting track platform 6 includes a movable track platform 601 and a wire rope winch 602. The movable track platform 601 is opened by the wire rope winch 602 to facilitate the construction personnel to enter the arch surface to lay the second locomotive track 503.

[0060] This invention also provides a method for simultaneous casting of an invert arch using a TBM, comprising the following steps:

[0061] 1) Slag removal section: After the TBM spraying area is completed, the excavator inside the tunnel is used to remove slag from the TBM travel track and the steel reinforcement binding area. The slag is transported away by the slag removal conveyor belt.

[0062] 2) Reinforcement binding section: Personnel promptly lay the TBM tracks on both sides and reserve two tracks for later laying of tracks on the invert surface, and bind the reinforcement at the bottom of the tunnel to form the initial shape of the invert model;

[0063] 3) Invert Arch Casting Filling Section: After the initial shape of the invert arch model is completed by binding the reinforcing bars, concrete is poured using the transport trolley 1 connecting the bridge area, the invert arch formwork 2, and the pouring system 4. First, the transport trolley 1 moves to the rear end and overlaps with the track of the lifting rail device 5. The pouring system 4 travels from the rear end of the TBM through the lifting rail device 5 to the track end of the transport trolley 1. The transport trolley 1 moves forward to the reinforcing bar area and uses the telescopic arm to press the invert arch formwork 2 against the bound reinforcing bar end. The pouring system 4 pours the reinforcing bar formwork. After the pouring is completed and the concrete has initially set, the invert arch formwork is demolded using the telescopic arm. After the TBM excavates to the front end where there is a ring (10-meter invert arch) of reinforcing bar formwork, the ring is poured.

[0064] 4) Pouring and filling section: After the invert arch is poured and filled, the invert arch pouring and filling section enters the next 10-meter formwork stage. At this time, the central trench formwork is installed in the completed invert arch pouring and filling section using the lifting rail device 5, and the upper part of the invert arch is filled and smoothed with concrete. After the concrete is formed, the formwork is removed using the lifting rail device 5.

[0065] 5) Invert arch maintenance section: Five trailers are set at the rear of the TBM. The total length of the five trailers is about 55 meters. Locomotive tracks are fixed in the middle of each trailer, connecting the bridge pouring area to the track laying area at the rear of the trailer. For large-diameter TBMs, it takes at least 3 days to excavate. The TBM excavation time at this stage can meet the invert arch strength equalization, and there is no need to stop the TBM due to waiting for the invert arch to reach the strength equalization. When the invert arch reaches the fifth trailer section, the locomotive track installation section can be entered.

[0066] 6) Locomotive track installation section: After the invert arch has been strengthened to the point that it can bear the weight of the locomotive, the intermediate tilting track platform 6 of the trailer is opened, allowing personnel to easily enter the invert arch area. The track reserved in the spraying area will be laid on the invert arch, thus ensuring that the passage of locomotives transporting materials from outside the tunnel will not be interrupted.

[0067] 7) Sloping track section: Due to the different heights of the platform track on the trailer and the track on the invert, a sloping track section is set up to bridge the height difference. The locomotive transporting materials can travel from the invert track to the intermediate platform track of the trailer through the sloping track section, thereby transporting the materials to the TBM invert casting section.

[0068] 8) Once all TBM trailers have completely detached from the rear track, the rear track can be disassembled and installed on the invert arch, thus completing the laying of the invert arch and the four-track, three-line system (see [link]). Figure 11 (As shown).

[0069] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A TBM invert arch casting device, characterized in that, It includes a transport trolley (1), an invert arch formwork (2), a central trench formwork (3), a pouring system (4), and a lifting rail device (5); The transport trolley (1) is slidably connected to the connecting bridge in the TBM for conveying concrete; The inverted arch template (2) is installed on the transport trolley (1), and the inverted arch template (2) includes a template body, a pouring window (201) and a first locomotive track (202) set on the template body. The first locomotive track (202) extends along the length of the template body, and the pouring window (201) is provided with two sets respectively set on both sides of the first locomotive track (202). The pouring system (4) is installed on the invert arch formwork (2), and the pouring system (4) includes a concrete tank (401), a self-propelled trolley (402) and a grouting pipe (403). The concrete tank (401) is installed on the self-propelled trolley (402). The self-propelled trolley (402) moves on the first locomotive track (202) by its own power. One end of the grouting pipe (403) is connected to the concrete tank (401), and the other end of the grouting pipe (403) extends to the pouring window (201). The lifting track device (5) is connected to the central groove template (3). Before pouring, the central groove template (3) is installed below the invert arch template (2). After the pouring is completed and the secondary lining is filled, the operator uses the lifting track device (5) to level the horizontal surface of the invert arch for pouring. After the horizontal surface of the invert arch is poured and initially set, the central groove template (3) is removed using the lifting track device (5) to complete the invert arch pouring. The lifting track device (5) includes a telescopic arm (501), an outer traveling platform (502), a second locomotive track (503), and a central slot connecting device (504). One end of the telescopic arm (501) is connected to the TBM connecting bridge, and the other end of the telescopic arm (501) is connected to the outer walking platform (502). The second locomotive track (503) is installed on the outer traveling platform (502); A center groove connecting device (504) is installed on the end face of the outer walking platform (502) away from the second locomotive track (503). The center groove connecting device (504) is connected to the center groove template (3).

2. The TBM invert arch casting device according to claim 1, characterized in that, The transport vehicle (1) includes a walking wheel mechanism (101), a drive device (102), a transport frame (103), and a telescopic device (104); the walking wheel mechanism (101) is movably connected to the TBM connecting bridge; the drive device (102) is used to drive the walking wheel mechanism (101) to move on the TBM connecting bridge; one end of the telescopic device (104) is connected to the transport frame (103), and the other end of the telescopic device (104) is fixedly connected to the TBM connecting bridge; the telescopic device (104) is used to drive the transport frame (103) to move vertically relative to the TBM connecting bridge.

3. The TBM invert arch casting device according to claim 1, characterized in that, A single set of pouring windows (201) is provided with multiple pieces that are spaced apart from each other along the length of the main body of the template; Furthermore, hoisting devices (203) are provided on both sides of the two sets of pouring windows (201).

4. The TBM invert arch casting device according to claim 1, characterized in that, The grouting pipe (403) is configured as a telescopic grouting pipe structure.

5. The TBM invert casting device according to claim 1, characterized in that, A rotary drive is provided between the grouting pipe (403) and the concrete tank (401). One end of the rotary drive is fixedly connected to the concrete tank (401), and the other end of the rotary drive is fixedly connected to the grouting pipe (403).

6. The TBM invert casting device according to any one of claims 1-5, characterized in that, It also includes a flip track platform (6); The tilting track platform (6) is used to provide a carrying track for the locomotive to enter the front of the TBM. The tilting track platform (6) includes a movable track platform (601) and a wire rope winch (602). The fixed end of the wire rope winch (602) is connected to the TBM connecting bridge, and the driving end of the wire rope winch (602) is connected to the movable track platform (601) to drive the movable track platform (601) to open or close.

7. A method for synchronously casting the invert arch of a TBM-connected bridge, characterized in that, include: After the initial shape of the invert arch model is completed by binding the reinforcing bars, concrete is poured using the TBM invert arch pouring device as described in any one of claims 1-6. First, the transport trolley moves to the rear end and coincides with the track of the lifting rail device. The pouring system travels from the rear end of the TBM through the lifting rail device to the end of the transport trolley track. The transport trolley moves forward to the reinforcing bar area and uses the telescopic arm to press the invert arch formwork against the bound reinforcing bar end. The pouring system pours concrete onto the reinforcing bar formwork. After the pouring is completed and the concrete has initially set, the invert arch formwork is demolded using the telescopic arm. After the TBM has excavated to the front end where there is a ring of reinforcing bar formwork, the ring is poured. After the invert arch is poured and filled, the invert arch pouring and filling section enters the next formwork stage. At this time, the central groove template is installed in the completed invert arch pouring and filling section using a lifting rail device, and the upper part of the invert arch is filled and smoothed with concrete. After the concrete is formed, the invert arch is demolded using a lifting rail device. When the invert arch is poured and all the trailer sections set up at the rear of the TBM are completed, the first locomotive track installation section begins. After the invert arch has been subjected to equal strength tests and has reached the strength to withstand the weight of the locomotive, the intermediate tilting track platform is opened, and the operators enter the invert arch area to lay the track reserved in the spray mixing area on the invert arch. Once all the TBM trailers are completely detached from the rear track, the rear track can be disassembled and installed on the invert arch, thus completing the laying of the invert arch and the four-track, three-line system.

8. The method for simultaneous invert arch casting of TBM connecting bridge according to claim 7, characterized in that, There is also a ramp section where locomotives transporting materials travel from the invert arch track to the trailer intermediate platform track to transport materials to the TBM invert arch casting section.

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